Gotham City

Sue Cindy’s city (DC setting). Her secret lab — a “science cave” — hides beneath a tile in the bathroom floor.

Sue Cindy operates here alongside Batman. Sue’s family lives at the other end of the city. Sue’s house/base is located “on the beaches” / “outer reaches of Gotham City in a secret place” — almost like a mansion. A tile on the bathroom floor conceals a tunnel leading to her secret lab below. The lab has “bubbling collagens,” test tubes on every table, and beaker cups with handles she added herself. Described as “her own bat cave type of spiel” — Ellie calls it “a science cave.”